package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐 同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //向套餐表中插入数据
        setmealMapper.insert(setmeal);

        //获取生成的套餐id
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmealId);
        }

        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据套餐id查询套餐和套餐关联的菜品信息
     * @param id
     * @return SetmealVO
     */
    public SetmealVO getByIdWithSetmealDishes(Long id) {
        //根据套餐id查询套餐信息
        Setmeal setmeal = setmealMapper.getById(id);

        //根据套餐id查询菜品信息
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        //将查询到的信息封装到VO里
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);

        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐和套餐关联的菜品
     * @param setmealDTO
     */
    @Transactional
    public void updateWithDishes(SetmealDTO setmealDTO) {
        //修改套餐信息
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        setmealMapper.update(setmeal);

        //删除原来的套餐关联菜品数据
        setmealDishMapper.deleteBySetmealId(setmealDTO.getId());

        //修改套餐关联的菜品信息
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null&&setmealDishes.size()>0) {
            for (SetmealDish setmealDish : setmealDishes) {
                setmealDish.setSetmealId(setmeal.getId());
            }
            setmealDishMapper.insertBatch(setmealDishes);
        }

    }

    /**
     * 批量删除套餐业务代码实现
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断套餐是否是起售中，起售中的套餐无法删除
        for(Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);

            if (setmeal.getStatus()== StatusConstant.ENABLE) {
                //套餐处于起售中不能删除
                throw new  DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //删除套餐表中的套餐数据(根据套餐id集合)
        setmealMapper.deleteByIds(ids);

        //删除套餐菜品关系表中套餐关联的菜品数据(根据套餐id集合)
        setmealDishMapper.deleteBySetmealIds(ids);
    }


    public void startOrStop(Integer status, Long id) {
        //判断需要启售的套餐中是否有未启售的菜品，有未启售的菜品将无法启售套餐
        if(status==StatusConstant.ENABLE) {
            List<Dish> dishList = setmealMapper.getDishesBySetmealId(id);
            if (dishList!=null&&dishList.size()>0) {
                for (Dish dish : dishList) {
                    if(dish.getStatus()== StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
